<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference: ::marker supports 'text-combine-upright'</title>
<style>
body {
  writing-mode: vertical-lr;
}
ol, ul {
  display: flow-root;
  list-style-type: none;
}
.symbol {
  list-style-type: disc;
}
ul {
  list-style-position: inside;
}
ol span {
  display: inline-block;
  margin-top: -50px;
  height: 50px;
  text-align: end;
}
span {
  text-combine-upright: all;
}
</style>
<ol><li><span>1. </span>outside decimal</li></ol>
<ol><li><span>2. </span>outside string</li></ol>
<ol><li><span>3. </span>outside content</li></ol>
<ol class="symbol"><li>outside symbol</li></ol>

<ul><li><span>1. </span>inside decimal</li></ul>
<ul><li><span>2. </span>inside string</li></ul>
<ul><li><span>3. </span>inside content</li></ul>
<ul class="symbol"><li>inside symbol</li></ul>